וְהַבָּא֙ אֶל־הַבַּ֔יִת כָּל־יְמֵ֖י הִסְגִּ֣יר אֹת֑וֹ יִטְמָ֖א עַד־הָעָֽרֶב׃
Moreover he that goeth into the house all the while that it is shut up shall be unclean until the even.
Read kabbalistic (mystical) interpretation of Leviticus 14:46: and classical mystical sources.